Golang之redis

redis是个开源的高性能的key-value的内存数据库，可以把它当成远程的数据结构。
支持的value类型非常多，比如string、list（链表）、set（集合）、
hash表等等
redis性能非常高，单机能够达到15w qps，通常适合做缓存。

使用第三方开源的redis库: github.com/garyburd/redigo/redis
import(
 "github.com/garyburd/redigo/redis"
）

1、windows安装redis

下载安装
https://github.com/MicrosoftArchive/redis 

解压，启动，如下

1

2、linxu安装redis

https://redis.io/download

 3、连接redis

package main

import (
    "fmt"
    "github.com/garyburd/redigo/redis"
)
func main(){
    c,err:=redis.Dial("tcp","127.0.0.1:6379")
    if err!=nil{
        fmt.Println("conn redis failed,",err)
        return
    }
    //fmt.Println("连接成功",c)
    defer c.Close()
}

4、set，get，设置键值，取得键值

package main

import (
    "fmt"
    "github.com/garyburd/redigo/redis"
)

func main() {
    //p是指针类型int
    var p *int
    var a int
    p = &a //p变量是个指针，指向a的内存地址
    *p = 0
    c, err := redis.Dial("tcp", "localhost:6379")
    if err != nil {
        //错误处理
        fmt.Println("conn redis failed,", err)
        return
    }
    defer c.Close()
    //设置值
    _, err = c.Do("Set", "abc", 100)
    if err != nil {
        fmt.Println(err)
        return
    }
    //从redis取值，取int类型的值
    r, err := redis.Int(c.Do("Get", "abc"))
    if err != nil {
        fmt.Println("get abc failed,", err)
        return
    }
    fmt.Println(r)
    //从redis取值，取name，string类型的值
    r1, err := redis.String(c.Do("Get", "name"))
    if err != nil {
        fmt.Println("get abc failed,", err)
        return
    }
    fmt.Println(r1)

}

5、hash表设置键值，取键值

package main

import (
    "fmt"
    "github.com/garyburd/redigo/redis"
)

func main() {
    c, err := redis.Dial("tcp", "127.0.0.1:6379")
    if err != nil {
        fmt.Println("conn redis failed,", err)
        return
    }
    defer c.Close()
    //设置hash
    _, err = c.Do("HSet", "books", "abc", 100)
    if err != nil {
        fmt.Println(err)
        return
    }
    //取得hash
    r, err := redis.Int(c.Do("HGet", "books", "abc"))
    if err != nil {
        fmt.Println("get abc failed,", err)
        return
    }
    fmt.Println(r)


}

6、批量set键值

package main

import (
    "fmt"
    "github.com/garyburd/redigo/redis"
)

func main() {
    //建立连接
    c, err := redis.Dial("tcp", "127.0.0.1:6379")
    if err != nil {
        fmt.Println("conn redis failed,", err)
        return
    }
    defer c.Close()
    _, err = c.Do("MSet", "abc", 100, "efg", 300)
    if err != nil {
        fmt.Println(err)
        return
    }
    r, err := redis.Ints(c.Do("MGet", "abc", "efg"))
    if err != nil {
        fmt.Println("get abc failed,", err)
        return
    }
    for _, v := range r {
        fmt.Println(v)
    }
}

7、设置过期时间

package main

import (
    "fmt"

    "github.com/garyburd/redigo/redis"
)

func main() {
    c, err := redis.Dial("tcp", "127.0.0.1:6379")
    if err != nil {
        fmt.Println("conn redis failed,", err)
    }
    defer c.Close()
    _, err = c.Do("expire", "abc", 10)
    if err != nil {
        fmt.Println(err)
        return
    }
}

8.list队列操作

package main

import (
    "fmt"
    "github.com/garyburd/redigo/redis"
)

func main() {
    c, err := redis.Dial("tcp", "127.0.0.1:6379")
    if err != nil {
        fmt.Println("conn redis failed,", err)
        return
    }
    defer c.Close()
    _, err = c.Do("lpush", "book_list", "abc", "efg", 300)
    if err != nil {
        fmt.Println(err)
        return
    }
    r, err := redis.String(c.Do("lpop", "book_list"))
    if err != nil {
        fmt.Println("get abc failed,", err)
        return
    }
    fmt.Println(r)
}

9、redis连接池pool

package main

import (
    "fmt"
    "github.com/garyburd/redigo/redis"
)

//poll是指针
var pool *redis.Pool

//初始化执行函数
func init() {
    pool = &redis.Pool{
        MaxIdle:     16,
        MaxActive:   0,
        IdleTimeout: 300,
        Dial: func() (redis.Conn, error) {
            return redis.Dial("tcp", "127.0.0.1:6379")
        },
    }
}
func main() {
    c := pool.Get()
    defer c.Close()
    _, err := c.Do("Set", "abc", 100)
    if err != nil {
        fmt.Println(err)
        return
    }
    r, err := redis.Int(c.Do("Get", "abc"))
    if err != nil {
        fmt.Println("get abc failed,", err)
        return
    }
    fmt.Println(r)
    pool.Close()
}